Abstract: This paper analyzes Acoustic Emission (AE) signals in accurate-grinding machining, and
influencing factors related in the process. It is indicated that there is favorable corresponding
relationship between AE signals with different characteristic parameters and accurate-grinding
status, which can be used to monitor the accurate-grinding machining and grinding quality.
Abstract: In order to satisfy the requirement of advanced manufacturing equipments with high speed
and high precision, two planar parallel mechanisms have been developed. Based on these
mechanisms, firstly, in consideration with the velocity and the precision of the end-effector together,
the dimension optimization design is performed based on conditioning index and the precision
characteristics. Then a disturbance observer is designed for the purpose of restraining load
disturbance in the direct-drive system, and the experimental results show that load disturbance can be
effectively restrained by the disturbance observer.